TREA

Extensible units located above or below standard props

Follow

Industry

  • CPC
  • E21D15/52
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D15/00Props Chocks

Current Industry

E21D15/52Extensible units located above or below standard props
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Adjustable lattice girder
    • Patent number 11,242,750
    • Issue date Feb 8, 2022
    • FCI Holdings Delaware, Inc.
    • John C. Stankus
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine support having a linearly moveable and/or pivoting end plate
    • Patent number 8,052,352
    • Issue date Nov 8, 2011
    • FCI Holdings Delaware, Inc.
    • Wallace Bolton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3712572
    • Patent number 3,712,572
    • Issue date Jan 23, 1973
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2664977
    • Patent number 2,664,977
    • Issue date Jan 5, 1954
    • E04 - BUILDING
  • Information Patent Grant

    1528034
    • Patent number 1,528,034
    • Issue date Mar 3, 1925
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1521764
    • Patent number 1,521,764
    • Issue date Jan 6, 1925
    • B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents